Far be it from me to advise you to get a storage drive if your really wanting to spend that kind of money on an SSD. But I would be remice if I didn't at least tell you that even the smallest SATA drives are better bang for the buck than an SSD.
Even when playing games the hard drive doesn't read (all the time) from the hard drive. You would not see a huge improvement in most games other than maybe games like world of warcraft that load an entire (world) on load.
It just seems a waste of money to put a bunch of programs on an SSD when the program would be just as quick on an SATA drive.
Honestly what takes a bunch of time is the booting up / starting of windows and initial install and download of a game, the rest is pretty quick. You normally wouldn't be able to tell the difference from SATA to SSD.
I guarantee you that if you use steam you will probably download a lot of games. You can set the steam download drive to a different drive so that it doesn't take space on your SSD (if your willing to put out the 300bux or more as stated above.
Again, I am not trying to push you into a second 'storage' drive I am just thinking.. in the long run .. we all want more space. Why start at the end when you need it when you could have started at the begining. Well I feel like im beating a horse so i'll just leave this with my aformentioned comments.
Good Luck !